Choke attachment for gun-barrels.



No. 653,6I3. Patented July I0, |900.

J. C. BROYLES.

GHUKE ATTACHMENT FOR GUN BARRELS.

(Application led Apr. 17, 1900.)

(No Model.)

rtree.

JAMES C. BROYLES, 0F COLUMBUS, MISSISSIPPI.

CHOKE ATTACHMENT FOR GUN-BARRELS.

SPECIFICATION forming part of Letters Patent No. 653,613, dated July 10,1900.

Application filed A,pril17, 1900. Serial No, 13.255. (No model.)

To all whom it' may concern.-

Be it known that I, JAMES C. BROYLES, a citizen of the United States,residing at Columbus, in the county of Lowndes and State of Mississippi,have invented a new and useful Choke Attachment for Gun-Barrels, ofwhich the following is a specification.

This invention relates to Shotguns, and has for one object to provide auimproved choke attachment therefor whereby the amount of taper at themuzzle of the gun-barrel may bey conveniently adjusted to control theconcentration and scattering of the discharged shot. It is furthermoredesigned to provide improved means for mounting the device upon thegun-barrel, so that it may be in convenient reach of the forward handwhich grasps the gun-barrel in order that it may be operated withoutremoving the gun from the shoulder, and finally to provide means forlimiting the device to a plurality of predetermined adjustment-s.

Vith these and other objects in view the present-invention consists iuthe combination and arrangement of parts, as will be hereinafter morefully described, shown in the accompanyingdrawings,andparticularlypointed out in the appended claims, it being understood thatchanges in the form, proportion, size, and minor details may be madewithin the scope of the claims without departing from the spirit orsacrificing any of the advantages of the invention.

In the drawings, Figure lis a side elevation of a magazine-shotgunhaving the present invention applied thereto. Fig. 2 is an enlargeddetail sectional View taken through the muzzle of the gun-barrel. Fig. 3is a detail perspective view of the muzzle of the gun-barrel. Fig. 4 isa'detail `perspective view of the adjusting'attachment. Fig. 5 is adetail perspective view of the cam-shaped stop for limiting theadjustment of the attachment.

Corresponding parts in the several figures of the drawings aredesignated by like characters of reference.

with a plurality of longitudinal incisions, thereby forming a pluralityof substantially fine or thin spring-tongues 4, which are designed to bedrawn inwardly to vary the diameter and the taper of the muzzle, andthereby adjust the degree of choke.

Slidable longitudinally upon the gun-barrel is a tube or sleeve 5,having the outer end 6o portion of its bore tapered, so that itssmallest diameter is at the outer end of the sleeve, and by drawing thesleeve rearwardly or toward the stock of the gun the spring-tongues 4will be drawn inwardly to increase the taper 65 of thebore of thegun-barrel at the muzzle thereof, and by moving the sleeve outwardly areverse adjustment of the tongues and the bore of the gun will be had.It will of course bc understood that the smallest diameter of 7o thebore of the sleeve will be substantially the same or a trifie greaterthan that of the gun-barrel, so that when the sleeve is at its outerlimit and the spring-tongues assume their normal position the bore ofthe sleeve may not interfere with the discharge of shot.

To conveniently operate the slidable sleeve, there is provided a pairot' diametrically-opposite jaws which are duplicates in form and arelocated at'opposite sides of the gun- 8o barrel. The forward end of eachjaw is rigidly connected to the rear end of the sleeve by means of anysuitable fastening and is curved or bowed downwardly to fit between themagazine 2 and the gun-barrel, the rear 85 end of the jaw being bentinwardly to form a rounded finger-piece 8 for the convenient operationof the sleeve and to prevent injury to the iingers of the hand whichoperates the loading-slide a, that is commonly mounted 9o upon themagazine. Intermediate of the opposite ends of the jaws there is aconnecting cross-bar 9, which holds the jaws together and is slidable inthe slot or space between the barrel and the magazine.

In order that the forward movement of the sleeve may be stopped atcertain predetermined limits, there is provided a stop ring or collar10, which is fit-'ted to turn upon the-forward end of the magazine andis held against roo forward displacement by the flanged closureplug 11,which is commonly provided for the forward end of the magazine. The rearedge 2 of this collar or ring' is inclined, so as to form a cam-face forengagement with vthe shoulder 13, formed integrally with the rear end ofthe sleeve, whereby the outward movement of the latter is limited. Byturning the Stop-collarnpon the magazine di Herent points of the camedge will be presented for engagement by the stop-shoulder on thesleeve, and

thus a great variety of limitations may be provided for the sleeve. Therearward movement of the sleeve is limited "by means of a stop 14, whichis .located in the path of the rear end of the sleeve and the shoulder13 and in the present application of the device isformed by the clip,which embraces both the gun-barrel and the magazine to connect thelatter to the former.

Although the present device has been shown and described ,as applied toa magazine-gun,

wherein the magazine forms a support for the stop ring or collar, yet itwill be understood that any suitable longitudinally-disposed support maybe employed.

I From the foregoing description it will be apparent that the presentinvention provides simple and efficient means for adjusting the choke ofa gun-barrel, and the device may be readily applied to a gun withoutchanging jaws extending rearwardly from the sleeve, lo-

cated at opposite sides of the barrel, and forming-,a finger-piece foradjusting the sleeve.

3. The combination with a gun-barrel, having anI exteriorly-smoothmuzzle, provided witha plurality of longitudinal incisions,I of aninteiorly-smooth sleeve, slidableupon the muzzlefand having a taperedbore,'which decreases in diameter toward the outer end thereof. /f-

4. The combination with a gun-barrel hav'-v ing .a plurality oflongitudinal incisions in the muzzle thereof, of a tapered sleeveslidable upon the muzzle, and an adjustable stop lto limit the forwardmovement of the sleeve.

5. The combination with a gun-barrel hav1 ing a plurality oflongitudinal incisions in the muzzle thereof, of a tapered sleeveslidable upon the muzzle, and provided with a stopshoulder, a support atone side of the barrel 6o and a rotatable stop mounted upon the supportand for en gage men t by the stop-shoulder.

6. The combination with a gun-barrel having a plurality of longitudinalincisions in the muzzle thereof, of a tapered sleeve slidable upon themuzzle, and provided with a stop-shoulder, a support at one side of thebarrel, and a'ca'm-shaped ring or collar,which is rotatable upon thesupport, and has its cam edge located in the path of the stop- 7oshoulder on the sleeve.

7. The combination with a shotgun, having a barrel which is providedwith a plurality of longitudinal incisions in the muzzle thereof, andalongitudinal support spaced at one side of the barrel, of a taperedsleeve slidable upon the muzzle of the barrel, a pair of opposite' jawsconnected to the rear or inner end of the sleeve, and having theiropposite ends received between the support and the barrel, a 8ostop-shoulder provided upon the rearend of the sleeve, and a rotatablecam-shaped ring or collar mounted upon the support and having itscam-face located in the path of the stop-shoulder on the sleeve. 8,5

8. The combination-with a gun-,barrel having a plurality of longitudinalincisions in the muzzle thereof, and a longitudinal tubular magazinespaced at one side of the barrel,

of a tapered sleeve slidable upon the muzzle, 9o 'a pair of oppositejaws connected to the rear end of the sleeve and having their rear endsreceived within the space between the magazine and the barrel, anintermediate crossbar connecting the jaws and slidable between themagazine and the barrel, a stop-shoulder upon the rear end of the sleeveand located between the barrel and the magazine, and a collar or ringrotatable upon the outer end of the magazine and having its .inner endin- 1o .clined or beveledto form a camedge located in the path of thestop-shoulder on the. sleeve. In testimony that I claim .the foregoingas 4my own I have hereto affixed my-signature lin

